Silylation of 2- or 3-Alkenenitriles with Iodo-silanes/Triethylamine Affording 2- or 4-Silyl-2-alkenenitriles H. Yamashita, N. P. Reddy, and M. Tanaka [Bull. Chem. Soc. Jpn., Vol.67, pp.1510-1513, 1994]